© 2002 Microchip Technology Inc.

DS21527B-page 5

TC1306

4.0

TYPICAL APPLICATIONS

4.1

Input and Output Capacitor

The TC1306 is stable with a wide range of capacitor

values and types. A capacitor with a minimum value of

1

capacitor should have an effective series resistance

(ESR) of 0.1

Ω to 10Ω for a 1µF capacitor and 0.01Ω to

10

Ω for a 10µF capacitor. A 1µF capacitor should be

inches of wire between the regulator and the AC filter

capacitor, or if a battery is used as the power source.

Aluminum electrolytic or tantalum capacitor types can

be used. (Since many aluminum electrolytic capacitors

freeze at approximately -30°C, solid tantalums are

recommended for applications operating below -20°C).

When operating from sources other than batteries,

supply-noise rejection and transient response can be

improved by increasing the value of the input and

output capacitors and employing passive filtering

techniques.

4.2

Shutdown Mode

Applying a logic high to each of the shutdown pins turns

on the corresponding output. Each regulator enters

shutdown mode when a logic low is applied to the

corresponding input. During shutdown mode, output

voltage falls to zero, and regulator supply current is

reducedto0.5

µA (max). If shutdown mode is not

4.3

Select Mode™ Operation

The Select Mode™ operation is a dual-state input that

values. By applying a logic low to the SELECT pin,

output voltage functionality provides high design

flexibility and minimizes cost associated with inventory,

time-to-market and new device qualifications.

4.4

Turn On Response

The turn on response is defined as two separate

The TC1306 has a fast Wake Up Time (10

µsec typical)

when released from shutdown. See Figure 4-1 for the

is defined as the time it takes for the output to rise to 2%

The total turn on response is defined as the Settling

within 2% of its fully enabled value (40

µsec typical)

when released from shutdown. The settling time of the

output voltage is dependent on load conditions, output

FIGURE 4-1:

WAKE-UP RESPONSE

TIME

98%

2%

SHDN